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a5494df2 SH |
1 | /* |
2 | * iplink_vxlan.c VXLAN device support | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Stephen Hemminger <shemminger@vyatta.com | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #include <string.h> | |
15 | #include <net/if.h> | |
16 | #include <linux/ip.h> | |
17 | #include <linux/if_link.h> | |
18 | #include <arpa/inet.h> | |
19 | ||
20 | #include "rt_names.h" | |
21 | #include "utils.h" | |
22 | #include "ip_common.h" | |
23 | ||
24 | static void explain(void) | |
25 | { | |
26 | fprintf(stderr, "Usage: ... vxlan id VNI [ group ADDR ] [ local ADDR ]\n"); | |
2d596120 SH |
27 | fprintf(stderr, " [ ttl TTL ] [ tos TOS ] [ dev PHYS_DEV ]\n"); |
28 | fprintf(stderr, " [ port MIN MAX ] [ [no]learning ]\n"); | |
1556e29d DS |
29 | fprintf(stderr, " [ [no]proxy ] [ [no]rsc ]\n"); |
30 | fprintf(stderr, " [ [no]l2miss ] [ [no]l3miss ]\n"); | |
a5494df2 SH |
31 | fprintf(stderr, "\n"); |
32 | fprintf(stderr, "Where: VNI := 0-16777215\n"); | |
33 | fprintf(stderr, " ADDR := { IP_ADDRESS | any }\n"); | |
34 | fprintf(stderr, " TOS := { NUMBER | inherit }\n"); | |
35 | fprintf(stderr, " TTL := { 1..255 | inherit }\n"); | |
36 | } | |
37 | ||
38 | static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv, | |
39 | struct nlmsghdr *n) | |
40 | { | |
41 | __u32 vni = 0; | |
42 | int vni_set = 0; | |
43 | __u32 saddr = 0; | |
44 | __u32 gaddr = 0; | |
45 | unsigned link = 0; | |
46 | __u8 tos = 0; | |
47 | __u8 ttl = 0; | |
48 | __u8 learning = 1; | |
1556e29d DS |
49 | __u8 proxy = 0; |
50 | __u8 rsc = 0; | |
51 | __u8 l2miss = 0; | |
52 | __u8 l3miss = 0; | |
a5494df2 SH |
53 | __u8 noage = 0; |
54 | __u32 age = 0; | |
55 | __u32 maxaddr = 0; | |
2d596120 | 56 | struct ifla_vxlan_port_range range = { 0, 0 }; |
a5494df2 SH |
57 | |
58 | while (argc > 0) { | |
59 | if (!matches(*argv, "id") || | |
60 | !matches(*argv, "vni")) { | |
61 | NEXT_ARG(); | |
62 | if (get_u32(&vni, *argv, 0) || | |
63 | vni >= 1u << 24) | |
64 | invarg("invalid id", *argv); | |
65 | vni_set = 1; | |
66 | } else if (!matches(*argv, "group")) { | |
67 | NEXT_ARG(); | |
68 | gaddr = get_addr32(*argv); | |
69 | ||
70 | if (!IN_MULTICAST(ntohl(gaddr))) | |
71 | invarg("invald group address", *argv); | |
72 | } else if (!matches(*argv, "local")) { | |
73 | NEXT_ARG(); | |
74 | if (strcmp(*argv, "any")) | |
75 | saddr = get_addr32(*argv); | |
76 | if (IN_MULTICAST(ntohl(saddr))) | |
77 | invarg("invalid local address", *argv); | |
78 | } else if (!matches(*argv, "dev")) { | |
79 | NEXT_ARG(); | |
80 | link = if_nametoindex(*argv); | |
81 | if (link == 0) | |
82 | exit(-1); | |
83 | } else if (!matches(*argv, "ttl") || | |
84 | !matches(*argv, "hoplimit")) { | |
85 | unsigned uval; | |
86 | ||
87 | NEXT_ARG(); | |
88 | if (strcmp(*argv, "inherit") != 0) { | |
89 | if (get_unsigned(&uval, *argv, 0)) | |
2d596120 | 90 | invarg("invalid TTL", *argv); |
a5494df2 | 91 | if (uval > 255) |
2d596120 | 92 | invarg("TTL must be <= 255", *argv); |
a5494df2 SH |
93 | ttl = uval; |
94 | } | |
95 | } else if (!matches(*argv, "tos") || | |
96 | !matches(*argv, "dsfield")) { | |
97 | __u32 uval; | |
98 | ||
99 | NEXT_ARG(); | |
100 | if (strcmp(*argv, "inherit") != 0) { | |
101 | if (rtnl_dsfield_a2n(&uval, *argv)) | |
102 | invarg("bad TOS value", *argv); | |
103 | tos = uval; | |
104 | } else | |
105 | tos = 1; | |
106 | } else if (!matches(*argv, "ageing")) { | |
107 | NEXT_ARG(); | |
108 | if (strcmp(*argv, "none") == 0) | |
109 | noage = 1; | |
110 | else if (get_u32(&age, *argv, 0)) | |
2d596120 | 111 | invarg("ageing timer", *argv); |
a5494df2 SH |
112 | } else if (!matches(*argv, "maxaddress")) { |
113 | NEXT_ARG(); | |
114 | if (strcmp(*argv, "unlimited") == 0) | |
115 | maxaddr = 0; | |
116 | else if (get_u32(&maxaddr, *argv, 0)) | |
2d596120 SH |
117 | invarg("max addresses", *argv); |
118 | } else if (!matches(*argv, "port")) { | |
119 | __u16 minport, maxport; | |
120 | NEXT_ARG(); | |
121 | if (get_u16(&minport, *argv, 0)) | |
122 | invarg("min port", *argv); | |
123 | NEXT_ARG(); | |
124 | if (get_u16(&maxport, *argv, 0)) | |
125 | invarg("max port", *argv); | |
126 | range.low = htons(minport); | |
127 | range.high = htons(maxport); | |
a5494df2 SH |
128 | } else if (!matches(*argv, "nolearning")) { |
129 | learning = 0; | |
130 | } else if (!matches(*argv, "learning")) { | |
131 | learning = 1; | |
1556e29d DS |
132 | } else if (!matches(*argv, "noproxy")) { |
133 | proxy = 0; | |
134 | } else if (!matches(*argv, "proxy")) { | |
135 | proxy = 1; | |
136 | } else if (!matches(*argv, "norsc")) { | |
137 | rsc = 0; | |
138 | } else if (!matches(*argv, "rsc")) { | |
139 | rsc = 1; | |
140 | } else if (!matches(*argv, "nol2miss")) { | |
141 | l2miss = 0; | |
142 | } else if (!matches(*argv, "l2miss")) { | |
143 | l2miss = 1; | |
144 | } else if (!matches(*argv, "nol3miss")) { | |
145 | l3miss = 0; | |
146 | } else if (!matches(*argv, "l3miss")) { | |
147 | l3miss = 1; | |
a5494df2 SH |
148 | } else if (matches(*argv, "help") == 0) { |
149 | explain(); | |
150 | return -1; | |
151 | } else { | |
152 | fprintf(stderr, "vxlan: what is \"%s\"?\n", *argv); | |
153 | explain(); | |
154 | return -1; | |
155 | } | |
156 | argc--, argv++; | |
157 | } | |
158 | ||
159 | if (!vni_set) { | |
160 | fprintf(stderr, "vxlan: missing virtual network identifier\n"); | |
161 | return -1; | |
162 | } | |
163 | addattr32(n, 1024, IFLA_VXLAN_ID, vni); | |
b64da5a5 SH |
164 | if (gaddr) |
165 | addattr_l(n, 1024, IFLA_VXLAN_GROUP, &gaddr, 4); | |
166 | if (saddr) | |
167 | addattr_l(n, 1024, IFLA_VXLAN_LOCAL, &saddr, 4); | |
a5494df2 SH |
168 | if (link) |
169 | addattr32(n, 1024, IFLA_VXLAN_LINK, link); | |
170 | addattr8(n, 1024, IFLA_VXLAN_TTL, ttl); | |
171 | addattr8(n, 1024, IFLA_VXLAN_TOS, tos); | |
172 | addattr8(n, 1024, IFLA_VXLAN_LEARNING, learning); | |
1556e29d DS |
173 | addattr8(n, 1024, IFLA_VXLAN_PROXY, proxy); |
174 | addattr8(n, 1024, IFLA_VXLAN_RSC, rsc); | |
175 | addattr8(n, 1024, IFLA_VXLAN_L2MISS, l2miss); | |
176 | addattr8(n, 1024, IFLA_VXLAN_L3MISS, l3miss); | |
a5494df2 SH |
177 | if (noage) |
178 | addattr32(n, 1024, IFLA_VXLAN_AGEING, 0); | |
179 | else if (age) | |
180 | addattr32(n, 1024, IFLA_VXLAN_AGEING, age); | |
181 | if (maxaddr) | |
182 | addattr32(n, 1024, IFLA_VXLAN_LIMIT, maxaddr); | |
2d596120 SH |
183 | if (range.low || range.high) |
184 | addattr_l(n, 1024, IFLA_VXLAN_PORT_RANGE, | |
185 | &range, sizeof(range)); | |
a5494df2 SH |
186 | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
191 | { | |
192 | __u32 vni; | |
193 | unsigned link; | |
2d596120 SH |
194 | __u8 tos; |
195 | __u32 maxaddr; | |
a5494df2 SH |
196 | char s1[1024]; |
197 | char s2[64]; | |
198 | ||
199 | if (!tb) | |
200 | return; | |
201 | ||
202 | if (!tb[IFLA_VXLAN_ID] || | |
203 | RTA_PAYLOAD(tb[IFLA_VXLAN_ID]) < sizeof(__u32)) | |
204 | return; | |
205 | ||
206 | vni = rta_getattr_u32(tb[IFLA_VXLAN_ID]); | |
207 | fprintf(f, "id %u ", vni); | |
208 | ||
209 | if (tb[IFLA_VXLAN_GROUP]) { | |
b64da5a5 | 210 | __be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_GROUP]); |
a5494df2 SH |
211 | if (addr) |
212 | fprintf(f, "group %s ", | |
213 | format_host(AF_INET, 4, &addr, s1, sizeof(s1))); | |
214 | } | |
215 | ||
216 | if (tb[IFLA_VXLAN_LOCAL]) { | |
b64da5a5 | 217 | __be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_LOCAL]); |
a5494df2 | 218 | if (addr) |
1556e29d | 219 | fprintf(f, "local %s ", |
a5494df2 SH |
220 | format_host(AF_INET, 4, &addr, s1, sizeof(s1))); |
221 | } | |
222 | ||
223 | if (tb[IFLA_VXLAN_LINK] && | |
224 | (link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]))) { | |
225 | const char *n = if_indextoname(link, s2); | |
226 | ||
227 | if (n) | |
228 | fprintf(f, "dev %s ", n); | |
229 | else | |
230 | fprintf(f, "dev %u ", link); | |
231 | } | |
232 | ||
2d596120 SH |
233 | if (tb[IFLA_VXLAN_PORT_RANGE]) { |
234 | const struct ifla_vxlan_port_range *r | |
235 | = RTA_DATA(tb[IFLA_VXLAN_PORT_RANGE]); | |
236 | fprintf(f, "port %u %u ", ntohs(r->low), ntohs(r->high)); | |
1556e29d | 237 | } |
2d596120 | 238 | |
a5494df2 SH |
239 | if (tb[IFLA_VXLAN_LEARNING] && |
240 | !rta_getattr_u8(tb[IFLA_VXLAN_LEARNING])) | |
241 | fputs("nolearning ", f); | |
1556e29d DS |
242 | |
243 | if (tb[IFLA_VXLAN_PROXY] && rta_getattr_u8(tb[IFLA_VXLAN_PROXY])) | |
244 | fputs("proxy ", f); | |
245 | ||
246 | if (tb[IFLA_VXLAN_RSC] && rta_getattr_u8(tb[IFLA_VXLAN_RSC])) | |
247 | fputs("rsc ", f); | |
248 | ||
249 | if (tb[IFLA_VXLAN_L2MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L2MISS])) | |
250 | fputs("l2miss ", f); | |
251 | ||
252 | if (tb[IFLA_VXLAN_L3MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L3MISS])) | |
253 | fputs("l3miss ", f); | |
254 | ||
2d596120 SH |
255 | if (tb[IFLA_VXLAN_TOS] && |
256 | (tos = rta_getattr_u8(tb[IFLA_VXLAN_TOS]))) { | |
a5494df2 SH |
257 | if (tos == 1) |
258 | fprintf(f, "tos inherit "); | |
259 | else | |
260 | fprintf(f, "tos %#x ", tos); | |
261 | } | |
262 | ||
263 | if (tb[IFLA_VXLAN_TTL]) { | |
264 | __u8 ttl = rta_getattr_u8(tb[IFLA_VXLAN_TTL]); | |
265 | if (ttl) | |
266 | fprintf(f, "ttl %d ", ttl); | |
267 | } | |
268 | ||
269 | if (tb[IFLA_VXLAN_AGEING]) { | |
270 | __u32 age = rta_getattr_u32(tb[IFLA_VXLAN_AGEING]); | |
271 | if (age == 0) | |
272 | fprintf(f, "ageing none "); | |
273 | else | |
274 | fprintf(f, "ageing %u ", age); | |
275 | } | |
2d596120 SH |
276 | |
277 | if (tb[IFLA_VXLAN_LIMIT] && | |
278 | (maxaddr = rta_getattr_u32(tb[IFLA_VXLAN_LIMIT]) != 0)) | |
279 | fprintf(f, "maxaddr %u ", maxaddr); | |
a5494df2 SH |
280 | } |
281 | ||
282 | struct link_util vxlan_link_util = { | |
283 | .id = "vxlan", | |
284 | .maxattr = IFLA_VXLAN_MAX, | |
285 | .parse_opt = vxlan_parse_opt, | |
286 | .print_opt = vxlan_print_opt, | |
287 | }; |